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I heard four or five loud bangs.
我听到四五声巨响。
《柯林斯英汉双解大词典》
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You make loud bangs at the surface and listen to the returning echoes.
您砰砰巨响在表面上，并听取返回的回声。
youdao
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You make loud bangs at the surface and listen to the returning echoes.
您砰砰巨响在表面上，并听取返回的回声。
youdao